hubbard



UNITED STATES PATENT OFFICE.

MOSES G. HUBBARD,

OF NEW YORK, N. Y.

METHOD 0F HANGING PLANE-STOCKS.

Specication of Letters Patent No.

To @ZZ whom may concern:

Be it known that I, M. G. HUBBARD, of New York, in the county of NewYork and State of New York, have invented a new and useful Improvementin Planing and Tonguing Boards; and I do hereby declare the following tobe a full, clear, and eXact description thereof, reference being had tothe accompanying drawing, which illustrates the same, in which- Thefigure is a horizontal section of plan with a portion of the frameremoved.

My improvement consists in the double set of planes having a movable bedbetween them supported against rollers for carrying forward the stuii tobe planed so that the two sides of av board can be successively planedwithout returning it back to its original place of entrance-or twoboards planed at the same time by which much time friction and power aresaved for a given amount of work done. This part of my machine isconstructed as follows: I form a suitable frame of cast iron or othermaterials to support the working parts as shown at (a, a,) in thedrawing. vertical rollers (32,) stationed in frame running through itscenterin a straight line; on either side of these rollers there aregrooves in which an endless series of plates move marked (o.) Theseplates are like those in Browns machine and some others and need nospecific description except that the two sides are leveled so that intheir return they form a second planing bed. These plates (c) have theirbea-rings against the rollers placed between them-the plates being alsovertical-outside these plates or movable planing beds a series of planesa're set in permanent stocks, but instead of being at right angles tothe plane of motion they are inclined, the upper ends of the knivesbeing set forward as shown by the drawing. This position of the knivestends to cut smoother and with less force but at the same time forcesthe board downward against its lower edge and would in ordinary machinescause reat friction-this I prevent by forming on t e lower edge of theplates composing the bed small proj ect-ions or flanges on which theThis frame has a series of 11,648, dated September 5, 1854.

board rests or instead thereof rollers may be substituted at that pointto relieve the board from the friction caused by the sideway pressure.In the same frame (2) to which the knife stocks are aflixed, two (moreor less) feed rollers (6L) are placed and properly set-so that as theframe of knives is set out or in for a thicker or thinner board the feedrollers (a) maintain the same relative position. The plane stocks (e) towhich the knives are attached are hung in the main frame (G) by lugs orears (F) projecting below the edge of the plane so that the action ofthe plane upon the board shall tend to force the heel of stock down uponthe board proportionably to the resistance of the cut-this isillustrated by sectional diagram-by which means I am enabled to employlight springs (i) to hold the heel of the plane stock down, and thus Iprevent excessive resistance when not required.

To the front of the frame holding the plane stock, I aix a gage plate(K) which is to be so set as to guard against the introduction of boardstoo thick to be introduced without breaking the machine.

The frame (0)'with its planes and feed rollers is attached to the mainframe (az) by any required number of screws (Z) that can be gearedtogether in any convenient way to be moved simultaneously.

Having thus fully described my improvement in planing lumber, what Iclaim therein as new and for which I desire to secure Letters Patentisl. The mode of suspending the plane stock, below the edge of the planeby which I increase the pressure on the heel of the stock as theresistance increases as above set forth and decrease the size of thesprings and the amount of friction attendant thereon.

2. I also claim the gage for preventing the insertion of a board ofimproper thickness as specified.

M. G. HUBBARD.

)Vitnesses W. L. E. WARREN, L. E. HOPKINS.

